package com.dao;

public class randompass {  
  
    public static String randomPassword (int length) {  
        int index = 0;  
        char[] charSet = new char[] {  
                '0','1','2','3','4','5','6','7','8','9'  
                ,'A','B','C','D','E','F','G','H','I','J','K','L','M'  
                ,'N','O','P','Q','R','S','T','U','V','W','X','Y','Z'  
                ,'a','b','c','d','e','f','g','h','i','j','k','l','m'  
                ,'n','o','p','q','r','s','t','u','v','w','x','y','z'};  
          
        StringBuffer sb = new StringBuffer();  
        for (int i=0; i<length; i++) {  
            index =  (int) (charSet.length * Math.random());  
            sb.append(charSet[index]);  
        }  
          
        return sb.toString();  
          
    }  
      
    public static void main(String[] args) {  
        System.out.println(randomPassword(10));  
  
    }  
}  